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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 326 (Fixed And MOVEABLE Window System) >> Diagnostic Information and Procedures >> Power Windows Malfunction (AEC, AED, AEQ) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the driver, passenger, left rear and right rear window move while commanding the window UP and DOWN with a scan tool.
    • If the window does not move UP and DOWN as commanded 

      Refer to Circuit/System Testing.

    • If the window moves UP and DOWN as commanded 
  3. Verify the scan tool Left Rear Main Control Down Switch, Left Rear Main Control Express Switch, Left Rear Main Control Up Switch, Right Rear Main Control Down Switch, Right Rear Main Control Express Switch, Right Rear Main Control Up Switch, Front Passenger Main Control Down Switch, Front Passenger Main Control Express Switch, and the Front Passenger Main Control Up Switch parameter changes between Inactive and Active when pressing and pulling each switch on the S79D Window Switch-Driver.
    • If the parameters do not change 

      Replace the S79D Window Switch-Driver.

    • If the parameters change 
  4. All OK.
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